clark



(No Model.)

J. F. CLARK.

STEAM BOILBR FURNAGE.

Patented Jul III il! www@ N Afro/WH,

To all whom, it may concern:

-ilwrrnn STATES PATENT @tirreno JOHN F. CLARK, OF NEV YORK, N. Y.

STEAMHBOBLER FURNAC.

SPECIFICATION forming part o Letters Patent No. 385,444, dated July 3,*12388.

Application filed December Q3, 1887. Serial No. Qjl. (No model.)

Beit known that l, JOHN F. CLARK, a citizen of the United States, and aresident of New York, in the county of New York and State of New York,have invented certain new and useful Improvenientsin Steam-Boiler.Furnaces, of which the following is a specifica tion.

The invention relates to improvements in steam-boiler furnaces, andparticularly to improvements in furnaces for locomotives, the objectbeing to provide durable and efficient means for distributing air to thefire-box and of creating a forced draft during such time as thelocomotive is in use.

The invention will be more fully understood from the detaileddescription hereinafter prcsented, reference being had to the accompanying drawings, in which- Figure l is a vertical transverse section of aboiler-furnace embodying the invention, the section being on the dottedline X X of Fig. 2, which is a central vertical longitudinal sec tion ofthe same on the dotted line Y Y of Fig. 1. Fig. 3 is an enlargedtransverse scc tion of the {ire-box, the section being on a line withthe top of the pipe supporting the air-distributers, hereinafterreferred to, one part ofthe distributers being left whole. Fig. 4 is avertical transverse section on the dotted line X X of Fig. 5, which is alcngitudt nal section on thedotted line Z D cf Fig. 4. Fig. Gis adetached view of the injector' for creating a forced draft throughthepipes snp plying the air to the airdistributers in the tirebox.

In the accompanying drawings, A indicates the boiler of a locomotive; B,the smoke-stack; C, the steam-dome; D, the smoke-box, and E thefire-box, the fire-box and smoke-box being connected in the usual mannerby the longitudinal fines F. The usual pipe for conducting the steamfrom the steam-dome to the stean1-chests (not shown) is lettered G, andindicated by dotted lines.

VNithin the upper part and rat cach side of the nre-box is arranged thelongitudinal pipes H, extending from the front to the back end of thebox, and the short transverse pipes or hollow arms Lwhich extend fromthe side walls of theire-box inward below and in close proximity to thelower surfaces of the longitudinal pipes H. The ends of the pipes H andthe outer ends ofthe pipes l open into the waterspace surrounding theiirebox, and when in use will contain water. The pipes Hare eachcomposed ot' two sections, lettered a b, respectively, connected by anieternally-thread ed sleeve, d, as', illustrated in Fig. 3, the extremeends of the pipe being threaded to enter suitablyfthreaded apertures inthe front and rear walls of the fire-box.

In applying the pipes Hin position thesections a b therein are screwedinto the sleeve d until their meeting ends come into Contact with eachother, at which time the pipe is inserted in the ire-box opposite to theapertures at each end thereof adapted to receive its threaded ends,whereupon the sections a b will be screwed apart a sufficient distanceto cause the extreme ends of the pipe to enter and engage the thread ofthe said aperturesin the walls of the fire-box, thereby securing thepipe in position. The pipes H are employed as a support for theair-distributers J, located one at each side of the lire-box, asillustrated in Fig. l, and each being composed of sections e, made fromlire-clay or other suitable mate rial which will not readily be affectedby heat from the lire. The external outline of the sections c of theair-distributers is illustrated in Fig. et, where it will be seen thatthe eenn ter of the distributer is hollow and paral lel with, though ona higher plane than, the supporting-pipe H, apertures f being` pro videdfor the distribution of the air inte the fire-box. That portion of theair-distributer adjacent to the side walls of the fire-bor; is flattenedand has a downward extension, 71., forming a leg which extends downwardbetween the said walls of the fire-box and the pipes H and serves to aidin the sustaining of the distributers in position upon the pipes H. The.lower surface of the sections e of the airdistributers is made concaveso as to snugly rest upon and pass partly around the surface of thepipes H. A sufficient number of sections c are arranged upon the pipesH, as illustrated in Fig. 2, to form air-distributcrs extending from thefront to the rear walls of Ico the fire-box. The hollow centers of thesections e form air-chambers z, in line with the tlues L, as indicatedin Figs. l and 2, each flue L being in connection with the pipe M,whichextends upward through the smoke-box, as indicated by dotted lines inFigs l and 2, and terminates in a bell-shaped mouth opening frontward,so as to receive a strong current of air when the locomotive is inmotion.

There are two tlues L, one on each side of the center of the boiler, andeach is in line with the air-chamber t?, `formed in theair-distributers, and each is in connection with a pipe, M, extendingupward to one side of the smoke-stack, whereby during the use of theboiler the air will enter the pipes M and pass through the same and theiiues L into the air-distributors and thence escape into the fire-boxthrough the apertures f.

In the smoke-box I have provided a small pipe, N, connecting the pipe G-with the pipe M, the upper end of the pipe N being provided with anozzle, I), as shown more clearly in Fig. 6,whereby, when the engine isin motion andthe steam is passing to the steamchests, a portion thereofwill ascend through the pipe N and be injected into the pipe M and fineL, creating thereby a forced draft through said Vflue and into the airdistributers. Eroli ot' the pipes M will be provided with thesteam-connection N, having the in` jector-nozzle I), in order that alike draft may be provided for each of the air-distributers.

lIhe purpose of having the pipes II and I in connection with thewater-chamber around the tire-box is to permit the water to enter saidpipes and thus preserve them from being destroyed by the heat. The pipesI'are screwed into the said walls of the fire-box and are usedprincipally to support the pipes H.

The sections e of the air-distributers, being made from fire-clay, willnot readily yield to the action of the heat, and when any one or more ofthem has become affected it will be removedand another quicklysubstituted.

Vhat I claim as my invention, and desire to secure by Letters Patent,is-

1. In the tire-box of avboiler-furnace, the pipe supporting theair-distributers,combined with the pipes I,whieh open into thewaterspaee and support the said pipe, and a pipe leading to the open airand being in connection with the,air-distributors, substantially as setforth.

2. In a boiler-furnace, the air-distributers Composed of hollowapertured sections e, having the downwardly-extending legextensions l1,and being concave on their lower contactsurfaces, combined with thehollow supporting-pipes H, which open into the water-space around saidfire-box, the flues L, and pipes M, substantially as and for thepurposes set forth.

3. In a boiler-furnace, the supporting-pipes H, having threaded ends andcomposed of sections a b, and sleeve d, combined with theair-distributers supported by said pipes, and

lllues leading from the open air to said distributors,substantially asand for the purposes set forth.

Signed at New York, in the county of New York and State of New York,this 22d day of December, A. l). 1887.

JOI-IN F. CLARK.

Witnesses:

Giras. C. GILL, XV. A. C. MATTI-HE.

